The electrical idea is basically a dead short it’ll either trip a fuse or melt something other than the bolt. - plan B required.
Could you somehow bore around the screw? Could you cut a slot in the head and try an impact driver? Could you drill 3-4 holes small holes close around the screw then try the impact driver? Could you double-nut the back side and get it to turn? Combinations of above? What is on the non-broken side? Sent from my iPhone > On Jul 20, 2021, at 6:09 PM, ALAN BERGEN via CnC-List <cnc-list@cnc-list.com> > wrote: > > > You can probably drive the bolt back through the transom using a hammer or > sledge hammer, and then a punch and a hammer. A hard strike should break it > free from the epoxy. If it's truly a carriage bolt, you don't want to try to > turn it. A carriage bolt has a round head and a square neck. > > Alan Bergen > 35 Mk III Thirsty > Rose City YC > Portland, OR > > > >> On Tue, Jul 20, 2021 at 2:42 PM dwight veinot via CnC-List >> <cnc-list@cnc-list.com> wrote: >> Can you just grind it away and leave it. >> >>> On Tue, Jul 20, 2021 at 3:41 PM Bill Coleman via CnC-List >>> <cnc-list@cnc-list.com> wrote: >>> I have a Broken ¼ - 20 broken carriage bolt with around 2 threads showing >>> out my transom. >>> >>> 1 ½” is embedded in epoxy. An easy-out seems unlikely. I did four, three >>> of them unscrewed successfully, but apparently I didn’t coat this one >>> thoroughly enough with the Vaseline. >>> >>> >>> >>> I am thinking that if I can heat the bolt up to around 300 degrees or so, >>> it will break the bond with the epoxy. A soldering iron seems *maybe* >>> possible, but that is only one side. I was wondering if I could heat it up, >>> like plumbers do with welders to melt frozen water lines, it might be an >>> option. >>> >>> But I don’t understand enough about electrical resistance to know how to go >>> about it. Using a battery for juice seems risky, having seen what happens >>> when I have shorted them out with a wrench – >>> >>> I do have a 30 amp adjustable Powerwerks power supply, which seems a little >>> safer. >>> >>> What I don’t understand, is if I can put a positive on one end of the bolt, >>> and negative on the other, will it heat the bolt, or will it just melt the >>> insulation off the wires? Or ruin the power supply? Or is it a factor of >>> the gauge of the wires? >>> >>> >>> >>> Bill Coleman >>> >>> Entrada, Erie, PA >>> >>> >>> >>> >>> >>> Thanks to all of the subscribers that contributed to the list to help with >>> the costs involved. If you want to show your support to the list - use >>> PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - >>> Stu >> -- >> Sent from Gmail Mobile >> Thanks to all of the subscribers that contributed to the list to help with >> the costs involved. If you want to show your support to the list - use >> PayPal to send contribution -- >> https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!61cXmQ3t_0HBAdnGhtRD8lgVwNjDVtT-8uqhtSM8F0aVJFfk5eDfhB2Km5s1TBL1Vk8$ >> Thanks - Stu > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
